Existence of stationary self-maintained combustion of porous and channel propellants

It is shown theoretically that in channel and porous propellants there exists a stationary self-maintained regime of propagation of a convective flame front. The existence of a spherical structure of the combustion zone results in the appearance of a qualitatively new propagation regime — subsonic relative to the condensed phase and supersonic relative to the gas phase ahead of the front. The final states of the reaction products lie on the branch of the detonation adiabat corresponding to weak detonation. It is shown that in a propellant with constant average density and thermal conductivity the velocity of the wave is variable and can be regulated by adjusting the size of the individual channels.